Unix's influence has been felt in many ways. It established many software engineering principles that persist until today; it was the OS of choice for the internet; it kicked off the open source movement and has been translated to run on many different types of hardware.

It was also at Bell that Dr Ritchie created C, one of the most widely used programming languages in the world. It is familiar to almost every modern-day developer.

Unix and variants of the operating system have been running the internet since the beginning, and, without them, well, don't even joke about it. Your contributions to computing were colossal, Dennis -- rest in peace.